is the {{CMD_8}} of an object at time {{MATH_9}}. This represents the ``change in position'' at time {{MATH_10}}. {{CMD_11}} {{MATH_12}} is the {{CMD_13}} of an object at time {{MATH_14}}. This gives location with respect to the origin. {{MATH_15}} {{CMD_16}} {{MATH_17}} is the {{CMD_18}}, the distance between the starting and finishing locations. {{CMD_19}}